Global Precipitation Measurement (GPM)는 3시간마다 전 세계의 비와 눈에 관한 차세대 관측 데이터를 제공하는 국제 위성 임무입니다. GPM용 통합 다중 위성 검색 (IMERG)은 GPM 컨스텔레이션의 모든 수동 마이크로파 기기의 데이터를 결합하여 강우량 추정치를 제공하는 통합 알고리즘입니다.
이 알고리즘은 전 세계 TRMM 및 GPM 시대에 대해 미세한 시간 및 공간 규모로 모든 위성 마이크로파 강수량 추정치와 마이크로파 보정 적외선 (IR) 위성 추정치, 강수량 게이지 분석, 잠재적으로 기타 강수량 추정치를 교정하고 병합하고 보간하는 것을 목표로 합니다.
이 시스템은 각 관측 시간에 대해 여러 번 실행되며, 처음에는 빠른 추정치를 제공하고 데이터가 더 많이 도착하면 더 나은 추정치를 연속적으로 제공합니다. 마지막 단계에서는 월별 게이지 데이터를 사용하여 연구 수준 제품을 만듭니다. 알고리즘에 관한 자세한 내용은 IMERG 기술 문서를 참고하세요.
이 컬렉션에는 데이터가 제공되면 업데이트된 버전으로 정기적으로 대체되는 임시 제품이 포함되어 있습니다. 제품은 'status'라는 메타데이터 속성으로 표시됩니다. 제품이 처음 제공될 때 속성 값은 '임시'입니다. 최종 버전으로 임시 제품이 업데이트되면 이 값은 'permanent'로 업데이트됩니다.
Global Precipitation Measurement (GPM)는 3시간마다 전 세계의 비와 눈에 대한 차세대 관측 데이터를 제공하는 국제 위성 임무입니다. GPM용 통합 다중 위성 검색 (IMERG)은 GPM 컨스텔레이션의 모든 수동 마이크로파 기기의 데이터를 결합하여 강우량 추정치를 제공하는 통합 알고리즘입니다. 이 알고리즘은 …
[null,null,[],[[["\u003cp\u003eThe NASA/GPM_L3/IMERG_V07 dataset provides global precipitation estimates every 30 minutes, combining data from various satellite and ground-based sources.\u003c/p\u003e\n"],["\u003cp\u003eIMERG is a unified algorithm that merges and interpolates data from the GPM Constellation's passive-microwave instruments, IR satellite estimates, and gauge analyses.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset covers the period from June 1, 2000, to December 12, 2024, with a spatial resolution of approximately 11 km.\u003c/p\u003e\n"],["\u003cp\u003eData products are initially provisional and are regularly updated to permanent status as more refined information becomes available.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is freely available for public use and is accessible through Google Earth Engine.\u003c/p\u003e\n"]]],[],null,["Dataset Availability\n: 2000-06-01T00:00:00Z--2025-08-31T02:30:00Z\n\nDataset Provider\n:\n\n\n [NASA GES DISC at NASA Goddard Space Flight Center](https://doi.org/10.5067/GPM/IMERG/3B-HH/07)\n\nCadence\n: 30 Minutes\n\nTags\n:\n [climate](/earth-engine/datasets/tags/climate) [geophysical](/earth-engine/datasets/tags/geophysical) [gpm](/earth-engine/datasets/tags/gpm) [imerg](/earth-engine/datasets/tags/imerg) [jaxa](/earth-engine/datasets/tags/jaxa) [nasa](/earth-engine/datasets/tags/nasa) [precipitation](/earth-engine/datasets/tags/precipitation) [weather](/earth-engine/datasets/tags/weather) \nhalf-hourly \n\nDescription \nGlobal Precipitation Measurement (GPM) is an international\nsatellite mission to provide next-generation observations of\nrain and snow worldwide every three hours. The Integrated Multi-satellitE\nRetrievals for GPM (IMERG) is the unified algorithm that provides\nrainfall estimates combining data from all passive-microwave\ninstruments in the GPM Constellation.\n\nThis algorithm is intended to intercalibrate, merge, and interpolate\nall satellite microwave precipitation estimates, together with\nmicrowave-calibrated infrared (IR) satellite estimates, precipitation\ngauge analyses, and potentially other precipitation estimators at fine\ntime and space scales for the TRMM and GPM eras over the entire globe.\nThe system is run several times for each observation time, first\ngiving a quick estimate and successively providing better estimates\nas more data arrive. The final step uses monthly gauge data to\ncreate research-level products. See [IMERG Technical Documentation](https://pmm.nasa.gov/sites/default/files/document_files/IMERG_doc.pdf)\nfor more details on the algorithm.\n\nDocumentation:\n\n- [Algorithm Theoretical Basis Document](https://arthurhou.pps.eosdis.nasa.gov/Documents/IMERG_V07_ATBD_final.pdf)\n\n- [IMERG Quality Index](https://docserver.gesdisc.eosdis.nasa.gov/public/project/GPM/IMERGV06_QI.pdf)\n\n- [Caveats for IMERG extension into TRMM era](https://docserver.gesdisc.eosdis.nasa.gov/public/project/GPM/IMERGV06_TRMMera-caveats.pdf)\n\n- [IMERG Technical Documentation](https://arthurhou.pps.eosdis.nasa.gov/Documents/IMERG_TechnicalDocumentation_final.pdf)\n\n- [Release notes; New Morphing algorithm](https://gpm.nasa.gov/resources/documents/imerg-v07-release-notes)\n\n- [Remote-Sensing Reflectance](https://gpm1.gesdisc.eosdis.nasa.gov/data/GPM_L3/doc/README.GPM.pdf)\n\n- [Anomalies](https://gpmweb2https.pps.eosdis.nasa.gov/tsdis/AB/docs/gpm_anomalous.html)\n\nThis collection contains provisional\nproducts that are regularly replaced with updated versions when\nthe data become available. The products are marked with a metadata\nproperty called 'status'. When a product is initially made available,\nthe property value is 'provisional'. Once a provisional product\nhas been updated with the final version, this value is updated\nto 'permanent'.\n\nThis collection contains data from:\n\n- GPM_3IMERGHH_V07 [doi:10.5067/GPM/IMERG/3B-HH-L/07](https://doi.org/10.5067/GPM/IMERG/3B-HH-L/07)\n- GPM_3IMERGHH_07 [doi:10.5067/GPM/IMERG/3B-HH/07](https://doi.org/10.5067/GPM/IMERG/3B-HH/07)\n\nBands\n\n\n**Pixel Size**\n\n11132 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Pixel Size | Description |\n|----------------------------------|---------------------|--------|--------|------------|-------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `MWobservationTime` | min. into half hour | 0\\* | 29\\* | meters | PMW source time |\n| `MWprecipSource` | | | | meters | PMW source sensor identifier |\n| Bitmask for MWprecipSource - Bits 0-3: PMW source sensor identifier - 0: No observation - 1: TMI - 2: (unused) - 3: AMSR - 4: SSMI - 5: SSMIS - 6: AMSU - 7: MHS - 8: SAPHIR - 9: GMI - 10: (unused) - 11: ATMS - 12: AIRS - 13: TOVS - 14: CRIS ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n| `MWprecipitation` | mm/hr | 0\\* | 120\\* | meters | merged PMW precipitation |\n| `IRinfluence` | % | 0\\* | 100\\* | meters | Kalman filter weight for IR |\n| `IRprecipitation` | mm/hr | 0\\* | 79.5\\* | meters | IR precipitation |\n| `precipitation` | mm/hr | 0\\* | 174\\* | meters | snapshot precipitation - calibrated |\n| `precipitationUncal` | mm/hr | 0\\* | 120\\* | meters | snapshot precipitation - uncalibrated |\n| `probabilityLiquidPrecipitation` | % | 0\\* | 100\\* | meters | probability of liquid precipitation phase |\n| `randomError` | mm/hr | 0.24\\* | 250\\* | meters | calibrated-precipitation random error |\n\n\\* estimated min or max value\n\nTerms of Use\n\n**Terms of Use**\n\nAll NASA-produced data from the GPM mission is made freely available for the public to use.\n\nCitations \nCitations:\n\n- Huffman, G.J., E.F. Stocker, D.T. Bolvin, E.J. Nelkin, Jackson Tan (2019),\n GPM IMERG Final Precipitation L3 Half Hourly 0.1 degree x 0.1 degree V06,\n Greenbelt, MD, Goddard Earth Sciences Data and Information Services Center\n (GES DISC), Accessed: \\[Data Access Date\\],\n [doi:10.5067/GPM/IMERG/3B-HH/07](https://doi.org/10.5067/GPM/IMERG/3B-HH/07)\n\nDOIs\n\n- \u003chttps://doi.org/10.5067/GPM/IMERG/3B-HH-L/07\u003e\n- \u003chttps://doi.org/10.5067/GPM/IMERG/3B-HH/07\u003e\n\nExplore with Earth Engine **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)\n\nCode Editor (JavaScript) \n\n```javascript\n// GPM V7 30 minute data for a single day.\nvar range = ee.Date('2019-09-03').getRange('day');\nvar dataset = ee.ImageCollection('NASA/GPM_L3/IMERG_V07')\n .filter(ee.Filter.date(range));\n\n// Select the max precipitation and mask out low precipitation values.\nvar precipitation = dataset.select('precipitation').max();\nvar mask = precipitation.gt(0.5);\nvar precipitation = precipitation.updateMask(mask);\n\nvar palette = [\n '000096','0064ff', '00b4ff', '33db80', '9beb4a',\n 'ffeb00', 'ffb300', 'ff6400', 'eb1e00', 'af0000'\n];\nvar precipitationVis = {min: 0, max: 15, palette: palette};\nMap.addLayer(precipitation, precipitationVis, 'Precipitation (mm/hr)');\nMap.setCenter(-76, 33, 3);\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NASA/NASA_GPM_L3_IMERG_V07) \n[GPM: Global Precipitation Measurement (GPM) Release 07](/earth-engine/datasets/catalog/NASA_GPM_L3_IMERG_V07) \nGlobal Precipitation Measurement (GPM) is an international satellite mission to provide next-generation observations of rain and snow worldwide every three hours. The Integrated Multi-satellitE Retrievals for GPM (IMERG) is the unified algorithm that provides rainfall estimates combining data from all passive-microwave instruments in the GPM Constellation. This algorithm is intended ... \nNASA/GPM_L3/IMERG_V07, climate,geophysical,gpm,imerg,jaxa,nasa,precipitation,weather \n2000-06-01T00:00:00Z/2025-08-31T02:30:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.5067/GPM/IMERG/3B-HH/07](https://doi.org/https://doi.org/10.5067/GPM/IMERG/3B-HH/07)\n- [https://doi.org/10.5067/GPM/IMERG/3B-HH/07](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NASA_GPM_L3_IMERG_V07)"]]